diff --git a/lib/libarchive/archive_read_support_format_tar.c b/lib/libarchive/archive_read_support_format_tar.c
index 1f0bf80b3098..796a466c7c49 100644
--- a/lib/libarchive/archive_read_support_format_tar.c
+++ b/lib/libarchive/archive_read_support_format_tar.c
@@ -985,7 +985,7 @@ header_common(struct archive_read *a, struct tar *tar, struct archive_entry *ent
 		 * Sparse files are really just regular files with
 		 * sparse information in the extended area.
 		 */
-		/* FALL THROUGH */
+		/* FALLTHROUGH */
 	default: /* Regular file  and non-standard types */
 		/*
 		 * Per POSIX: non-recognized types should always be
diff --git a/lib/libarchive/archive_write_disk.c b/lib/libarchive/archive_write_disk.c
index 3ed1eed4ddfd..8980cd0bb993 100644
--- a/lib/libarchive/archive_write_disk.c
+++ b/lib/libarchive/archive_write_disk.c
@@ -794,7 +794,8 @@ create_filesystem_object(struct archive_write_disk *a)
 
 	switch (a->mode & S_IFMT) {
 	default:
-		/* Fall through, as required by POSIX. */
+		/* POSIX requires that we fall through here. */
+		/* FALLTHROUGH */
 	case S_IFREG:
 		a->fd = open(a->name,
 		    O_WRONLY | O_CREAT | O_EXCL, mode);